The institution was the Royal Naval Hospital. Howard was the Inspector General of Hospitals. It also states married 17 years , 3 children born all still living. So as there are just 2 daughters with him maybe George is his son working elswhere in the hospital. On the other hnd it doesn't fit with length of marriage if George is 21 !!!
Here's George... but not working in the hospital
1911 RG14PN13013 RD277 SD1 ED9 SN9999 Reg. District: East Stonehouse Royal Marine Barracks, ROYAL MARINE BARRACKS Durnford Street East Stonehouse Devon
TODD, George ESingleM 21 1890 Pte Royal Marines Lanark Glasgow